This is part of the problem of getting a solar array. Every few years the efficiency increases a large amount and now your investment would take half as long to "pay off" using the new panels as your own ones. Really, the only thing keeping me from getting an array is that I don't want to where I live currently and want a large enough setup with batteries, wind, genset and if possible small scale hydro that I could be full off-grid for as long as the shop has parts to fix my systems. However, Getting a system that "pays" for itself a lot faster is a lot more desirable, assuming they are at least if not more durable than the older setups. Archive: https://archive.today/FaWud From the post: >>Oxford PV, a global leader in next-generation solar, has started the commercialisation of their record-breaking tandem solar technology with the first shipment to a U.S.-based customer. The 72-cell panels, comprised of Oxford PV’s proprietary perovskite-on-silicon solar cells, can produce up to 20% more energy than a standard silicon panel. They will be used in a utility-scale installation, reducing the levelised cost of electricity (LCOE) and contributing to more efficient land use by generating more electricity from the same area. This development marks the first commercial deployment of a perovskite tandem solar panel worldwide. Oxford PV has been developing and working to commercialise this technology since 2014, with a recent module efficiency record of 26.9%. The first Oxford PV panels available on the market have a 24.5% module efficiency, offering performance significantly above traditional silicon technology. The panels are powered by perovskite-on-silicon cells produced at Oxford PV’s megawatt-scale pilot line in Brandenburg an der Havel, Germany.